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Evaluation of Photoneutron by Hypofractionated Radiotherapy
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 Title & Authors
Evaluation of Photoneutron by Hypofractionated Radiotherapy
Park, Eun-Tae; Lee, Deuk-Hee; Kang, Se-Sik;
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Hypofractionated radiotherapy prescribes high dose once. Due to this there`s a bad point that patients are exposed much dose in normal organ. But recently the study making up for a limit is continuing. Cause of preference of this kind of development of therapy technic and high-energy photon beam, patients can be exposed to additional radiation. Because photoneutron is created by photonuclear reaction. So, in this study I measured photoneutron and analyzed by DVH amounts of radiation from the treatment plan that was used to acute, metastatic pelvis cancer patients who was treated by hypofractionated radiotherapy applied IMRT. As a result, incidence of photoneutron based on the hypofractionated radiotherapy was not a big difference in proportion to the dose fractionation. Protective effects of normal organ by hypofractionated radiotherapy applying IMRT is relatively high compared to 3D CRT but also photoneutron was in created. So a proper treatment plan and a best therapy should be considerated.
Hypofractionated radiotherapy;IMRT;Photonuclear reaction;Photoneutron;
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